Could this be it!??

I'm not sure what day I ovd according my chart I had one opk that was dark enough for me to get super happy thinking I was ovulating but it went right back down to a faint line throughout the day. We bd'd every other day since the last day of my last cycle. I have PCOS with irregular cycles but based off this app says im 6 days late now.

I did start vitex and evening primerose oil this cycle. For the past 3 days I've been having sporadic spotting from Pink to brown and dry to light cm now this thick cm with brown discharge.

Shooting pains in uterus and boobs for a week now. I did test yesterday morning & got a Bfn but I'm hoping this is implantation bleeding. What do y'all think ???